Exploring integrated approaches for optimal well placement: a compelling case study of the Sarvak carbonate reservoir within an Iranian oilfield
Abstract The primary purpose of this study is to identify the high reservoir quality area for drilling and perforation of new wells using interrelated geological, petrophysical, and seismic data. Various datasets such as, core analysis data (two wells), petrophysical logs (twenty wells) and 3D seism...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-01-01
|
| Series: | Journal of Petroleum Exploration and Production Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s13202-024-01909-1 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Abstract The primary purpose of this study is to identify the high reservoir quality area for drilling and perforation of new wells using interrelated geological, petrophysical, and seismic data. Various datasets such as, core analysis data (two wells), petrophysical logs (twenty wells) and 3D seismic cube were used to consider different scenarios for optimum well placement based on the availability and accuracy of the data. Considering four criteria (structure, reservoir property, fracture network, and heterogeneity), various data were combined to assess reservoir potential. A static reservoir model was constructed to reduce the uncertainty of the well location determination. A range of scenarios were implemented based on this static reservoir model or by relying only on the available seismic data. Electrofacies analysis was conducted to establish representative facies with which to guide the forecasting of locations suitable for drilling the new wells. Six facies were determined based on multi-resolution graph-based clustering (MRGC) method. In parallel, 3D seismic data was applied to determine seismic facies and seismic attributes to identify high-quality reservoir areas for well placement. As high fracture intensity is an essential feature required for high oil/gas production rates, a continuous fracture model (CFM) was constructed, and average intensity fracture maps were developed to determine the best production locations and to avoid low-productivity (or potential loss-of-circulation zones) from a drilling perspective. Some structural issues, such as distances from transition zones and/or faults, were also considered for well-placement purposes. Coefficient of variation (as a heterogeneity criteria) was also taken into account for well-placement decision-making. The results indicate that applying the developed integrated approaches reduces well-placement uncertainty and delineates high-quality reservoir zones (or sweet spots) with more confidence. |
|---|---|
| ISSN: | 2190-0558 2190-0566 |